Teebitoey



(No Model.)

B. A. EDWARDS.

ANEMOMETER No. 315,261. Patented Apr. '7, 1885.

L I ATTORNEYS.

UNITED STATES PATENT tries.

EATON A. EDXVARDS, OF FORT MEADE, DAKOTA TERRITORY.

ANEMOMETER.

SPECIFICATION forming part of Letters Patent No. 315,261, dated April 7,1885.

Application filed June 6, 1884. (No model.)

To all whom it may concern:

Be it known that I, EATON A. EDWARDS, of Fort Meade, in the county ofLawrence and Territory of Dakota, have invented a new and usefulImprovementin Ancmometers, of which the following is a full, clear, andexact description.

The object of my invention is to furnish a simple and inexpensive devicefor determining with approximate accuracy the velocity of the wind atthe moment of observation, and par ticularly adapted for use of ritlemenat target practice. For that purpose I make use of a pressure-disk on aspindle that is arranged to operate a pointer, and these are combinedwith a vane, and with means for indicating the direction of the windwith reference to the target, all as hereinafter described and claimed.

Reference is to be had to the accompanying drawing, forming a part ofthis specification, in which my improved windgage is shown in elevation.

The post or stake A has folding braces gt, when made for field use, ofany suitable arrangement for firmly supporting the post. The vane B hasa thimble, Z, stepped on the top of the post to allow free rotation ofthe vane, and the thimble carries a pointer, 0, arranged to move inconnection with a numbered dial, 1), for indicatingthe direction of thewind with reference to the target or other fixed pointthat is to say,the apparatus being set so that the vane points to the target whenpointer 0 is at the zero-point, the position at right or left willindicate the angle at which the wind blows across theline. in a slotrunning lengthwise of the vane is a spindle, d, supported in bearings e0, so that it may slide endwise. Around the spindle is a spiral spring,f, that takes behind a collar on the spindle, and on the projecting endof the spindle is a disk, g, the area of which is a convenient part of asquare foot.

On the larger end of the vane is pivoted a pointer, it, that connects bya link, i, with spindle d, and a fixed quadrant, 7t, properly graduated,is arranged for the outer end of the pointer to move over. The pressureof the wind on disk g causes inward movement of the spindle, and that inturn swings the pointer so that it indicates on the scale the velocityof the wind. calculated from the pressure in pounds per square foot, atany moment. In this form the apparatus is adapted for the use ofritlemen and others, and though not strictly accurate in itsresults,will serve all practical purposes.

The pointer or indicator need not be on the vane, and any special formof indicator may be used.

When applied to a vane on a building, the indicator may be at any placedesired.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. An anemometer consisting, essentially, of a vane,a longitudinally-moving spindle mounted thereon, a pressure-disk mountedat one end of said spindle, a pointer connected with the end of thespindle opposite the disk, and a dial, substantially as described.

2. In an anemometer, the sliding spindle d, spring f, disk g, and anindicating device, in combination with vane 13, substantially as shownand described.

3. The combination, with a vane, of disk 9, sliding spindle (7, springf, and pointer 71, movably connected to that end of the spindle oppositethe disk, substantially as described, for operation as specified.

al. The combination, with the standard A, provided with a dial, b, ofthe anemometervane pivoting on said standard, and thepointe er 0,connected therewith and extending to the face of the dial, substantiallyas set forth.

EATON A. EDlVARDS.

Witnesses:

GEO. H. CAMERON, B. O. SPILMAN.

